Beware of rape to open "anti-flowers"

After the rapeseed is finally dried, the dormant buds in the leaves of the leaves may re-grow and open the second flower, commonly known as "reverse flowers." Rapeseed is a kind of anomalous phenomenon. The flowering of this flower is time-consuming, it consumes nutrients and cannot be solid, and it will aggravate the spread of diseases and have a great impact on the yield.

There are four reasons why rape can be used for "reverse flowering": First, excessive nitrogenous fertilizer and imbalance of carbon and nitrogen ratio in the later period cause the stems and leaves to be soft, and the degree of lignification is low, causing the plants to fall down. The dormant buds in the leaves have sufficient sunlight and nutrients. It will grow and blossom. The second is that the inflorescence of rape is harmed by the aphid, and the flowering period is postponed, or the damage to the big branching flower can not bloom, and the small branch re-emerged. The third is the lack of boron so that rapeseed dysplasia, secondary branching, resulting in mature flowering. Fourth, the varieties are mixed or degenerate, the plant growth is uneven, and the number of branches is not the same. Some open flowers and form “radish” pods. This type of rapeseed will also open “anti-flowers”.

In order to prevent rapeseed from “anti-flowering”, in addition to the selection of improved varieties and measures to ensure the purity of the variety, attention should be paid to the management of the field. First, rational fertilization. The wax fertilizer should be applied before and after the "Xiaohan", but also to prevent partial nitrogen fertilizer, pay attention to increase phosphorus and potassium fertilizers, in order to enhance the resistance of the stem. Potassium fertilizer can not only enhance the strength of the stalk, improve lodging resistance, but also increase the concentration and osmotic pressure of the tissue cell fluid, enhance disease resistance and cold resistance, and increase the content of oil and fat. The amount of potassium absorbed by rapeseed is approximately equal to the amount of nitrogen uptake. Therefore, it is necessary to apply enough potassium to apply potassium sulfate or potassium chloride 7.5-10 kg per mu. The lack of boron in rapeseed is easy to produce “atrophy” disease. Spraying borax at the seedling stage can prevent it, and can also be applied in the fertilizer water with 500 grams of borax per acre rape field, or the special compound fertilizer containing boron can be applied. The second is to prevent and control aphids in time to prevent aphids from harming rapeseed inflorescences. The number of aphids to achieve prevention and control indicators can be used as follows: 15% net 2000 times solution, or 80% dichlorvos 800 times or 2.5% enemy-killed 8000 times, or 20% fenvalerate 3000 times, or 2.5% deltamethrin 3000 times liquid spray.